Building-block and method of forming the same.



P. AARONSON.

BUILDING BLQGK AND METHOD OF FORMING THE SAME. APPLICATION FILED FEB.20,1913.

1,086,975. Patented Feb. 10, 1914.

9 WITNESSES INVENTOR j% I Buzz la razzjan M V M momvsys UNITED STATESPATENT OFFICE.

FRANK AARONSON, OF MANASQUAN, NEW JERSEY.

BUILDING-BLOCK AND METHOD OF FORMING THE SAME.

To all whom it may concern Be it known that I, FRANK AAnoNsoN, a citizeno the United States, and a resident of Manasquan, in the county ofMonmouth and State of New Jersey, have invented new and ImprovedBuilding-Blocks and Method of Forming the. Same, of which the followingis a full, clear, and exact description.

Among the principal objects which the present invention has in view are:to provide blocks of the character mentioned with undressed faces; toprovide said blocks with roughened faces, said faces being forlnedwithout design; to provide a molded block having an unmolded face; andto provide a block of the character mentioned having a face roughened byforcefully separating said face from a body of the same material.

One embodiment of the present invention is shown in the accompanyingdrawings, in which Figure 1 is a perspective view of a block constructedin accordance with the present invention, and showing a rock-faced panelraised thereon with a draft-line surrounding the same; Fig. 2 is asimilar view, the face of the block being shown as having a chamferededge and arranged to show smaller fracture markings.

Blocks embodying the present invention.

are preferably constructed from suitable Portland or setting cementwherein sand is mixed. The blocks are preferably formed in molds, andare provided with body portions 7, in which are vertically disposedapertures 8 and end anchoring grooves 9. These blocks are molded andpressed to form a homogeneous close-grained body. I prefer to render thecement non-absorbent after completion and when thoroughly dry, bydipping the same in, or wiping the same with, any of the suitabledamp-proofing materials well known to the art.

The building blocks are constructed in various sizes and according todesign. \Vhen constructed in accordance with the present invention, eachis provided with a face 10, which may be limited in area to a section,of the exposed edge or side of the block, as seen in Fig. l of thedrawings, or may envelop the entire exposed surface of the block, asshown in Fig. 2 of the drawings.

The blocks being constructed from a ma- Specification of Letters Patent.

Application filed February 20, 1913.

Patent-ed Feb. 10, 1914.

Serial N 0. 749,606.

when dressed or finished according to the various conventional methodsand designs. These surfaces have been prepared by casting or molding thesame upon a form or pattern. This practice has necessarily resulted inthe production of objectionable uniformity in the design of moldedbuilding blocks. It is part of the purpose of the present invention toovercome this objection by eliminating the feature of design orreplication of the surface, and to do this, I have devised means forpulling the body of the material, when pressed, away from the surface.Several means have been devised by me for accomplishing this result, theperformance of each of which produces a block having a face theformation of which may be termed to be purely accidental. One of themethods mentioned consists in placing a section of wire screen themeshes whereof are relatively large, in the plastic material, to becovered by the upper layer of the material forming the block when thesame is pressed, and then pressing the same. After the material'haspartially set, said screen and partiallyset material superposed thereonare lifted from the body of the block. A further object obtained by thismethod is that the grain of the material, instead of being, as atpresent, closed or filled, has much of the porosity of fracture lines ofa natural rock.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A block as characterized, formed from plasticsetting material by molding the body of said block, then pulling thematerial forming the surface of one side, from the body of the blockwhen said material is partially set, to form a face for said block.

2. The method of forming building blocks, consisting in molding saidblocks name to this specification in the presence of from plasticsetting material, an excess of two subscribing witnesses. said plasticmaterial being used to form one 1. side thereof; then pulling saidexcess mate- FRANK AARONOON' 5 rial from the body of said block whensaid Witnesses:

plastic material is partially set. E. F. MURDOCK,

In testimony whereof I have signed my PHILIP D; RoLLHAUs.

